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Garmin

Garmin GMC 305 Autopilot Mode Controller

Name: Garmin GMC 305 Autopilot Mode Controller
Brand: Garmin
SKU: 010-01169-00
Price: 28383.45 CZK
Availability: InStock

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Garmin GMC 305 is the panel-mounted mode controller for the GFC 500X autopilot in G3X avionics for non-type-certificated aircraft, with RS-232 links to the GDU display and the GSA 28 roll servo. Available without (-00) or with (-20) yaw damper button.

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What do Advanced Exchange, Future Exchange and Repair mean? Read the guide →

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P/N010-01169-00

010-01169-00 010-01169-20 011-03226-00

Condition

NewP/N 010-01169-00 Serviceable / Overhauled

Your selection: P/N: 010-01169-00 · Condition: New

Ships in 2 weeks Ordered from supplier before dispatch

28.383,45 CZK incl. VAT

23.457,40 Kč excl. VAT

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Garmin GMC 305 is a panel-mounted mode controller for the GFC 500X autopilot and flight director in G3X avionics for non-type-certificated aircraft. Its buttons give dedicated control of the autopilot and flight director modes, and basic autopilot modes remain available from the GMC 305 even when all GDU displays are unpowered.

The unit connects by RS-232 to a GDU 37X or GDU 4XX display; a second RS-232 channel goes to the GSA 28 roll servo for reversionary autopilot operation. It runs on 14 V or 28 V and draws 0.050 A at 14 V. Garmin builds 010-01169-00 without and 010-01169-20 with a yaw damper (YD) button. Unit P/N 011-03226-00 is the version without YD and is offered as a serviceable/overhauled unit.

The GMC 305 mounts flush in the instrument panel with four #6-32 cap screws and measures 158.8 × 47.0 × 83.8 mm. Installation kit 010-12034-00 with connector and mounting hardware is not included, and the wiring harness is made during installation. Fit depends on the P/N, the GDU display model and the autopilot servos.

Technical specifications

Part number	010-01169-00 / 010-01169-20 / 011-03226-00	Current draw	0.050 A @ 14 V / 0.028 A @ 28 V
Manufacturer	Garmin	Dimensions	158.8 × 47.0 × 83.8 mm
For unit	G3X / GFC 500X	Weight	0.226 kg
Interfaces	RS-232	Eligibility	Experimental only
Supply voltage	14 / 28 V DC

Advanced Exchange ships a serviceable unit before the core is returned. Future Exchange begins after receipt and evaluation of the core and does not require a deposit. Repair retains the original serial number and starts with inspection and quotation.

Advanced Exchange

What happens: You receive a serviceable unit first. Your core goes back afterward.
Pay now: Full SV price plus core deposit.
Core: Return within 15 calendar days. Repairable (not BER) — deposit refunded. Missing or BER — deposit stays.
Time: Typically 2–3 weeks. Warranty 3 months. Released on EASA Form 1 or FAA 8130-3.

Future Exchange

What happens: You send the core first. After we confirm it is repairable, we ship the serviceable replacement.
Pay now: Net exchange price only. No deposit.
Core: Must be repairable (not BER). Same or superseded P/N, data plate on.
Time: Typically 3–4 weeks. Warranty 3 months. Released on EASA Form 1 or FAA 8130-3.

Repair

Serial: Yours stays. No swap unit — that is Exchange.
Shop: We inspect, quote, then repair. Accept the repair quote and the evaluation fee already paid is deducted. Decline or BER — unit returns as-is; evaluation fee stays.
Time: Typically 2–6 weeks after you approve the quote, parts depending. Warranty 3 months. Released on EASA Form 1 or FAA 8130-3.

Return the core in equivalent packaging, with removal data and a non-incident statement where you have them. Late, incomplete, or rejected-core terms are on the quote.

Which systems does the GMC 305 work with?

It is the control panel of Garmin's GFC 500X autopilot with GSA 28 servos, either in a G3X or G3X Touch system (GDU 37X or 4XX displays) or with experimental G5 instruments running the autopilot. It has no direct connection to navigators or portable GPS units such as a GNS 430 or aera. Like the rest of G3X, it is for aircraft without a type certificate.

Can the GMC 305 drive existing TruTrak servos?

Garmin designs the GMC 305 for the GFC 500X, which runs on Garmin GSA 28 servos. Some third-party autopilots built to integrate with G3X can work with the G3X flight director and a GMC panel; whether a particular TruTrak installation qualifies is a question for the autopilot manufacturer.

Does the GMC 305 work on its own if the displays fail?

Partly. It is not a stand-alone autopilot: it needs a G3X or G5 installation with GSA 28 servos. If all G3X displays lose power, basic autopilot modes can still be controlled from the GMC 305, because it has its own RS-232 link to the GSA 28 roll servo.

How big is the GMC 305, and how is it mounted?

158.8 mm wide, 47.0 mm high and 83.8 mm deep, weighing 0.226 kg. It mounts flush in the instrument panel with four #6-32 cap screws. The installation kit 010-12034-00 with the connector and mounting hardware is not included with the unit, and the wiring harness is made during installation.

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Garmin GMC 305 Autopilot Mode Controller

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